Key arrangement



FIG. 1 is a front, top, and left side perspective view of a key arrangement with the broken line matter being for illustrative purposes only and forming no part of the claimed design; and,

FIG. 2 is a front elevational view of the key arrangement of FIG. 1 within the broken line matter being for illustrative purposes only and forming no part of the claimed design. 

The ornamental design for a key arrangement, as shown and described. 